˜yÐÄvlog

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color index

noun

Astronomy.
  1. the difference between the apparent photographic magnitude and the apparent visual magnitude of a star.
  2. the difference between the magnitudes of a star in any two spectral regions.


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˜yÐÄvlog History and Origins

Origin of color index1

First recorded in 1920–25
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Example Sentences

Examples have not been reviewed.

A color index might lead reporters with an appetite for eye-catching headlines to produce misleading stories of an out-of-control border.

From

Tall, dark Howard Ketcham, 33, began his color career in an advertising agency, joined the automotive paint division of du Pont de Nemours & Co.. reduced 13,000 body colors to the 600 listed in the Automotive Color Index.

Last, but not least, the translucent tissues, the semi-transparent skin, barely veiling the pulsating mesh of myriad blood-vessels, is a superb color index, painting in vivid tints—"yellow, and ashy pale, and hectic red"—the living, ever changing, moving picture of the vigor of the life-centre, the blood-pump, and the richness of its crimson stream.

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